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Routers deal with IP traffic (and even have to mess with TCP, e.g. clamp MSS), not just the 802.1 and 802.11. For SOHO routers, high PPS multicast UDP may be something hardware-accelerated routing doesn't particularly account for. And if software routing kicks in, high packet rate can very easily overload poor device's CPU.



It's due to the way multicast packets are transmitted on Wifi...

https://tools.ietf.org/id/draft-mcbride-mboned-wifi-mcast-pr...




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